Compound engine valve



J. T.. HINIUN.

COMPOUAND ENGINE VALVE. Arme/(Tian FILED MAY 25. 1920.

1,409, 1 1 0. y Pawna Mar. 7, 1922,.

UNITED STATES PATENT OFFICE.

. .Toniv T. HiNroN, or MOULTRTE, GEORGIA.

COMPOUND ENGINE VALVE.

' T 0 all whom it may concern.'

Be it known that I, JOHN T. HINTON, a citizen of the United States, residing at Moultrie, in the county of Colquitt and State of Georgia, have invented certain new and useful Improvements in a Compound Engine Valve, of which the following is a speciiication. I E" This invention relates to improvements in engine valvesV and the mechanism whereby they are operated, and has forl one of its objects to simplify and improve the con struction and increase the etliciency and utility of devices of this character. Y

Another object of the invention is to provide a device of this character which is substantially silent in action, lcan be utilized to reverse the engine, has the minimum of friction owing to the reduced number of parts, freer and faster action of the gases, and rreduction in the cost of manufacture.

With these and other objects in view, the invention consists in certain novel features of construction as hereinafter shown and described and then specically pointed out in the claimsand in the drawings illustrative of the preferred embodiment of the invention,

Figure 1 is a vertical sectional elevation showing the valve in exhaust position.

igure 2 is a similar view showing the slide valve closing the exhaust and opening the inlet port, the poppet valve wide open, and thecrank slightly past the upper dead center.

Figure 3 is a similar A slide valve at the lower end of the stroke, the inlet port open and the poppet valve moving toward closing position.' Y

F igure-t is a similar view with the valve at the upper end of its stroke with theslide valve moving toward exhaust position and the poppet valve closed. A f i l Figure 5 is an enlarged detail of the joint between the poppet valve stem and the connecting rod of the eccentric.

Figure 6 is a transverse section on the line 6 6 of Fig. 1. 1

Figure 7 lis a detail illustrating the arrangement of parts to produce a reversing viewv showing the mechanism.

The improved device is designed for use in connection with internal combustion engines, and for the purpose of illustration is shown applied to an engine of this class including the cylinder 10, piston 11, crank Specification of Letters Patent.

Patented Mar. 7, 1922.

1920. Serial No. 384,136.

shaft 12 having the crank 13 coupled to the piston by the usual connecting rod 14.

Formed in the upper end of the cylinder is a cylindrical valve seat 15 in which a plunger slide valve 16 is arranged to operate. e n intake port 17, and an exhaust port 18 communicate with the seat 15 one above the other.

ports 21 prostem 23 is tubular at the outer end, and con-` nected within the tubular portion by a combined ball and socket and yieldable joint is a connecting rod so that the poppet valve may be moved to a limited extent independently of the movement of the main valve 16. At the inner end of the tubular portion of the stem 23 a semi globular socket 27 is formed to receive the ball shaped terminal 28 of a rod 29.

Atits outer end the bore of the stem 23 is internally threaded to recive a stop washer 30 through which the rod 29 passes, the opening in the washerbeing suiliciently large to permit the rod to have considerable lateral play. y

Slidable in the stem 23 is a sleeve 31 having a socketed lower end 32 to engage the ball shaped terminal 28 of the Stem 29. A spring 33 is disposed within the sleeve and bears upony the socket portion 32 and beneaththe stop washer 30.

By this means a longitudinally yieldable joint is produced between the stem and rod.

1 Mounted on a shaft 35 and supported in any .suitable manner relative to the engine frame or cylinder 10, is an eccentric 36 including a strap 37, the rod 29 being extended and connected to the eccentric strap as shown at38. By this arrangement when the shaft 35 is rotated motion will be imparted to the stem 23 and the valve 24 carried thereby.

Extending from the cylinder body 10 is a bracket 39, and pivoted at 40 on the bracket is a two-part bell crank lever 41, the latter being coupled by one pair of its arms to the kor yieldable movement by reason of the spring controlled coupling between the eccentric 36 and the stem 23. The ball and socket ieature between. the rod 29 and the stem 23, permits the action of the eccentric without producing strain.

By this arrangement the movements are accomplished practically without noise, as there are no loose cam devices to produce pounding noises.

The motion may be reversed by employ-V ing two eccentrics 44 and 45 and a segmental link 46 of the ordinary construction, as illustrated in Figure 7.

The eccentrics 44 and 45 are connected by arms 47 and 4S to the curved slotted link 46. Slidable in the slot of the link is a block 49 the latter pivoted at 40 to the vertical arm of the bell crank lever 41.

The link 46 is suspended by a hanger 52, to which an operating lever 53 is coupled by a connecting rod 54. i

The lever 53 operates over a toothed segment 55 with which a pawl device 56 carried by the lever 53 engages.

By this arrangement the curved link `46 may be adjusted on the block 49 to any required extent within the range of the slot of the link and locked in adjusted position.

The pin 50 operates the valve 16 through the action of the bell crank lever 41.

The link 46 as shown brings the pin 50 in line with the eccentric rod 47 and the motion imparted to the valve will be the same as if there were only one eccentric 44, the other eccentric 45 running idle.

ly elevating the link 46 to its upper position, to bring the rod 43 in line with pin 50,the eccentric 44 will run idle and the eccentric will control the motion of the valve 16 and the direction ot rotation of the shaft 12 will be reversed, inthe ordinary manner et devices of this character.

The shaft 35 is driven 'from the main shaft 12 in any suitable manner, for instance by chain wheels 57 and 5S and `chain 59 as indicated in Figure 1 of the proper proportions. Generally the wheel 57 will be double the size ot the wheel 5S to produce the required motion.

In Figure 1 of the drawings, the parts are shown arranged with the exhaust of the main. valve 16 open and thc'crank 13 positioned ahead of the lower dead center about 2Oo and with the poppet valve just beginning to open. In this position, (which is the end of the firing stroke), the main valve 16 is wide open and the hot gases will pass out around the poppet valve 24 as the piston travels in the up stroke to 7 degrees past the upper dead center. This will heat the poppet valve 24.

Figure 2 shows the relative location of the parts when the crank 13 is positioned about 7 past the upper dead center and the main valve 16 closing the upper exhaust port and about to open the lower inlet portwith the poppet valve 24 wide open. At this point the hot gases will have passed out and around the poppet valve 24 and the cold gases will come in around the poppet valve 24 with the effect of cooling the valve and at the ,same time heating the incoming gases. Y

Figure 3 shows the relative location or the part-s when the crank 13 is positioned about 200 past the lower dead center, the main valve 16 at the lower end of its stroke with the lower inlet port open, the exhaustport closed and the poppet valve 24 just closing. At this point the poppet valve 24 closes and on the up stroke et thepiston the gas is compressed and the main valve 16 is being drawn back into exhaust position. The poppet valve being closed cuts ott all connection between combustion charnber and main valve 16. Y Figure 4 shows the'relative location oi the parts when the crank 13 is positioned at the lower dead center, the main valve 16 returning to exhaust position, and the poppet valve 24 closed." Theengine tires when the parts are shown as in Figure 4, with the poppet valve 24 closed, the pres-V sure of the compression stroke and burning gases on the firing stroke are not admitted to the slide or main valve 16. vThis makes it possible to use continuous eccentries instead of irregular cams in the operation of the valves.. Y p

The spring in the connection between the poppet valve and the eceentricallows the poppet valve to be held in position from 20 past dead center to 20 ahead ofV dead center on the compression and firing stroke. This operationY is necessary in order to enablev the eccentric to be used in connection with the poppet valve 24, but is not objectionable as the working stroke of the ball socket is only about i on a 2 valve. Y The preferred embodiment of the invention is disclosed in the drawings and set forth in the specifications, but it will be' understood that any modifications within the scope of the claims may be made in the construction without departing Jfrom the principle of the invention or sacrificing any of its. advantages. Y

What I claim is:

l. An engine including a body having cylinder and a cylindrical valve seat communicating with the cylinder and with an inlet and an exhaust port in spaced relation, a piston operative in said cylinder, a

l shaft connected to be operated by said piston, a centrally bored major valve movable in said seat and having ports providing communication with the cylinder and alternately communicating with said inlet and exhaust ports, a minor valve adapted to be seated loetwen the cylinder andthe valve seat and including a stem operative through the bore of the major valve, an eccentric device including an eccentric strap connected for operation from the shaft, a bell crank element mounted on the engine body, means for operatively coupling said eccentric strap to said minor valve, connecting means between said major valve and one arm of said bell crank lever, and connecting means between said major valve and the other arm of said bell crank lever.

2. An engine including a cylinder having a valve seat communicating therewith and provided with an inlet and an exhaust port in spaced relation, a piston operative in said cylinder, a shaft 'connected to be driven by said piston, a major valve movable in said valve seat and having ports providing communication with the cylinder and alternately communicating with said steam and exhaust ports, a minor valve adapted to be seated between the cylinder and valve seat, valve operating means connected for movement by said shaft, cou

pling means between said major valve and the operating means, and longitudinally yieldable coupling means between the minor valve and the operating means.

In testimony whereof7 I aiix my signature hereto.

y JOHN T. HINTON. 

